<nz-upload [nzAction]="'/api/'+url" [nzHeaders]="{ authorization: 'authorization-text' }"
  [nzShowUploadList]="false" (nzChange)="handleChange($event)">
  <button nz-button nzType="primary">
    <span nz-icon nzType="cloud-upload"></span>
    导入
  </button>
</nz-upload>